6. Google Fit Platform

The Google Fit Platform is a rival to Apple's HealthKit — an app that aggregates stats and info about the user's health and fitness. It is not an app, but it will interface with wearables and connected fitness gadgets like the Withings scale to share information about the user to other apps. Adidas and Nike are among the members taking part in Google Fit. Nike Fuel will be compatible with Google Fit.